/* -*- mode: c ; c-file-style: "canonware-c-style" -*-
 ******************************************************************************
 *
 * Copyright (C) 1996-2004 Jason Evans <jasone@canonware.com>.
 * All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice(s), this list of conditions and the following disclaimer
 *    unmodified other than the allowable addition of one or more
 *    copyright notices.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice(s), this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER(S) ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT HOLDER(S) BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
 * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 ******************************************************************************
 *
 * Version: Onyx 5.1.1
 *
 ******************************************************************************/

#include <pcre.h>

typedef struct cw_nxoe_regsub_s cw_nxoe_regsub_t;

/* Substitution template element.  A substitution template is decomposed into a
 * vector of these. */
typedef struct
{
    /* String pointer and length for a plain string.  If str is NULL, then len
     * instead specifies a capturing subpattern. */
    char *str;
    uint32_t len;
} cw_nxoe_regsub_telm_t;

struct cw_nxoe_regsub_s
{
    cw_nxoe_t nxoe;

    /* pcre data structures. */
    pcre *pcre;
    pcre_extra *extra;

    /* Number of elements (each element is an int) needed for output vectors
     * that are passed to pcre_exec(). */
    int ovcnt;

    /* Amount of memory allocated for the structures pointed to by pcre and
     * extra.  Unfortunately, it is prohibitively difficult to integrate pcre
     * with nxa's allocator API in a multi-threaded interpreter, so pcre and
     * extra are allocated with plain old malloc().  Thus, their sizes have to
     * be queried and the GC informed of their size. */
    size_t size;
    size_t studysize;

    /* Flag used when determining whether to substitute just one, or all
     * matches. */
    bool global;

    /* Number of capturing subpatterns. */
    int capturecount;

    /* Template string and length.  vec elements point into this string. */
    char *template;
    uint32_t tlen;

    /* Vector of template elements. */
    cw_nxoe_regsub_telm_t *vec;
    uint32_t vlen;
};

#ifndef CW_USE_INLINES
bool
nxoe_l_regsub_delete(cw_nxoe_t *a_nxoe, uint32_t a_iter);

cw_nxoe_t *
nxoe_l_regsub_ref_iter(cw_nxoe_t *a_nxoe, bool a_reset);
#endif

#if (defined(CW_USE_INLINES) || defined(CW_NXO_REGSUB_C_))
CW_INLINE bool
nxoe_l_regsub_delete(cw_nxoe_t *a_nxoe, uint32_t a_iter)
{
    cw_nxoe_regsub_t *regsub;

    regsub = (cw_nxoe_regsub_t *) a_nxoe;

    cw_check_ptr(regsub);
    cw_dassert(regsub->nxoe.magic == CW_NXOE_MAGIC);
    cw_assert(regsub->nxoe.type == NXOT_REGSUB);

    if (regsub->vec != NULL)
    {
	nxa_free(regsub->vec, sizeof(cw_nxoe_regsub_telm_t) * regsub->vlen);
    }

    if (regsub->template != NULL)
    {
	nxa_free(regsub->template, regsub->tlen);
    }

    /* Destroy pcre. */
    free(regsub->pcre);
    if (regsub->extra != NULL)
    {
	free(regsub->extra);
    }
    /* Tell the GC that pcre has been deallocated. */
    nxa_l_count_adjust(-(cw_nxoi_t)(regsub->size + regsub->studysize));

    nxa_free(regsub, sizeof(cw_nxoe_regsub_t));

    return false;
}

CW_INLINE cw_nxoe_t *
nxoe_l_regsub_ref_iter(cw_nxoe_t *a_nxo, bool a_reset)
{
    return NULL;
}
#endif /* (defined(CW_USE_INLINES) || defined(CW_NXO_REGSUB_C_)) */
